Ventilating device



April 7, 1925.

DE WITT T. LYON vENTILATNG DEVICE Filed Aug. 15 1924 IN VEN TORATTORNEYS "iii atented pr. 7, i925.

UNITED c rara-Nr orifice.

DE wirr TAYLORv LYON, or` onions-o, irrt-mors', Assis-non or erinnern,fro "BanierH n. LYON, or ogsirlrnfieo,v ritiri-ois.

vsNrrLn'rr'Nr-r DEVI-on.

Application filed. August 15, 1924. Serial No. 732,288.V

Be it li'nown that I, DE livrer Tarpon InoN, a citizen ofthe UnitedStates,- and a resident of Chicago, county of Cook',I and State ofIllinois, have invented a new and useful Improvement in VentilatingDevices, of 'which the following is a full, clear, and enactdescription.

My invention relates to improvement-s in ventilating devices, and itconsists inthe combinations, constructions,- and arrangements hereindescribed and claimed.

An object of my invention is to provide an adjustable ventilator of theso-called mushroom type' b-ut Which is an improvement over that setforth in my p-rior United States Patent No. 1,425,028 of August 8,

The device Whichv forms the subject o-f the present applicationisdesigne'd like that of thc priorpatent aforesaid to be used primarilyin Veonnectioi'r With theatreventilation, the device' being"V disposedunderneath the seatsof the theatre.

An object of the present invention is-to provide a ventilator which hasa greater ventilating opening tha'nlthat set forth in my prior patent,but `at the same time vmay be placed on, and will oper-"ate effectivelyon a platform or tier of no greater Width than that occupied by thedevice set forth in the patent. In other Words., the present inventionis designed to afford greater facility for ventilation Without taking upa correspondingly greater space.

A. further object of my invention is to provide a ventilator of anoblong shape which has means for permitting the adjustment of the deviceto permit more or less air to enter.

A further object of my invention is to provide a Ventilating device ofthe type described having relatively few parts, and being provided withmeans for adjustment which render such adjustment comparatively easy.

Other objects and advantages will appear in the following specification,and the novel features of the invention Will be particularly pointed outin the appended claims.

My invention is illustrated in the accompanying drawings, forming partof this application, in Which- Figure 1 is a top plan view of thedevice,

Figure 2 is a section along the line 2-2 of Figurel 1,- lcolring in thedirection of the arrows, and

Figure Bis an end view of the device.

In carrying ont my' invention I provide Van oblong hollow casting 1,substantially ofY elliptical ferm having rounded end portions. Thiscasting forms a Wall and has an integral flange 2 near the'b'ottomthereof arranged. to rest on the Afloor 3,= the lat-ter being providedwith an (opening 4 forthe admission of the loiver portion of theycasting 1. Extending ears or lugs 5 are providedv for securing thecasting to the Hoor, these ears or lugs being provided With suitableopenings for screws or bolts.

@n the' exterior of the casting 1 is a series of integral finger-likeridges 6', separated by spaces. The' spaces 7 it will be observed areclosed at one end by an integral Vconneet-ing member 8 from ivhich thefingers-6' a=t-11. Itwvill be observed that it consists f of a coverhaving a dished or concave-shape. The cover extends over the edge of thecasting 1 and is turned down slightly. It is provided With integral legsor supports 12 which have ribs 13 on their inner sides, these ribs beingsepa-rated by spaces 14.

The rounded end portions of the casting are made on arcs having theircenters at the intersection of the major and minor axes of the device.

From the foregoing description of the various part-s of the device, theoperation there- 0f may be readily understood. It has been found in theventilation of large buildings, such as theatres or the like, that tosecure the best results, frequent adjustment of the ventilator isdesirable. The present device fulfills the requirements of a ventilatorWhichis easily adjustable. Consider Figure 3 of the drawing. I-Iere aventilator is shown open. If it is desired to partially close it, thecover portion 11 is rotated until the ridges 13 which are supported bythe ridges 6 and 9 pass beyond the ends of these ridges, when the covermay be lowered bodico Y accidental displacement.

ily until the ridges 18 engage the next longer ridge 6, when therotation of the device can be reversed so as to bring the cover into itsnormal position, but now resting on a ridge which is lower, i. e.,nearer the floor. This will of course tend to partially close theopening betsveen the cover and the upper end of the casting. Similarlythe cover may be lowered'so that its supports will rest on anyof the:ridges 6, these, as shown in the drawing, being successively longertoward the bottom.

The purpose of having the lower ridges successively longer is so thatthe ridges ron the legs may be broughtinto instant registration. If theridges 6 were all of the same length, the cover would drop down to thebottom when it had cleared therupper ridges 6. Where each ridge isprogressively longer, it drops down onto the next ridge and is inimmediate registrati-on with the ridges on the exterior of the device atthis level.

YYIn the construction described, the threading of the main casting whichwas necessary in the device shown in the prior patent is obviated. Agreater' area Yfor. ventilation is securedV with a givenV width, whichwidth need only be Vthe minor dimension of the device. Aft-er thedesired position is reached, the cover may be locked in position bymeans of the set screw 15 so as to prevent I claim:

1.'A Ventilating device comprising an oblong wall of substantiallyelliptical shape, a plurality of supporting members carried by said wallon the exterior thereof, said members being progressively longer fromtop to bottom of said wall, and a lcover portion having legsY arrangedto fit over said wall and provided with means for engaging any of saidsupporting members lfor holding said cover in predetermined relationwith respect to the top of the wall.

2. A Ventilating device comprising an oblong hollow casting havingrounded ends, a series of parallel ridges disposed on the outside of thecasting, said ridges being progressively longer toward the bottom of thedevice, a cover, and supports for said' cover having means arranged torest 0n any of said ridges for supporting said cover at predeterminedpositions with respect to the top edge of the casting. Y

3. A Ventilating device comprising an elongated hollow casting ofsubstantially elliptical shape having a series of integralparallel'ridges, said ridges being progres sively longer from `to-p tobotto-m of the casting, a cover having a plurality of legs, each of saidlegs being provided with ridges arranged to engage the ridges osaidcover and being shiftable to`- engage other ridges, whereby the covermay be suppgorted at varying distances 'from the top of Vthe casting. Y.l v

4. A Ventilating device comprising an elongated hollow casting ofsubstantially elliptical shape having aseiies of integral parallelridges, said ridges being progressively longer from top to bottom of thecasting, a cover having aplurality of legs, each of said legs beingprovided with ridges arranged to engage the ridges of said coverandibeing shiftable to engage other ridges,

whereby the cover may be supported at varying distances from thetop ofthe cast ing, and means for locking `the cover in its shifted position.Y

DE WITT TAYLOR LYON.

